The Sierra HD’s Hollywood style and hard-working heritage make for a supremely capable pickup. The heavy-duty GMC and Chevy Silverado HD are twins separated at birth and share much of their sheetmetal and the available Duramax diesel and Allison transmission combo. The Duramax cranks out a class-leading 445 horsepower and a tremendous 910 lb-ft of […]
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2018 GMC Sierra 2500HD / 3500HD in Depth: Good Looking, Hard Working
